Resample

Author: pschatzmann

examples/examples-basic-api/basic-a2dp-i2s/basic-a2dp-i2s.ino

@@ -6,26 +6,16 @@
  * @copyright GPLv3
  */
 
-/**
- * @file basic-a2dp-audioi2s.ino
- * @brief A2DP Sink with output to SPDIFStream
- * 
- * @author Phil Schatzmann
- * @copyright GPLv3
- */
-
 #define USE_A2DP
 #include "AudioConfigLocal.h"
 #include "AudioTools.h"
-#include "AudioExperiments/Resample.h"
 
 BluetoothA2DPSink a2dp_sink;
 I2SStream i2s;
-Resample<int16_t> out(i2s, 2, 2);
 
 // Write data to SPDIF in callback
 void read_data_stream(const uint8_t *data, uint32_t length) {
-    out.write(data, length);
+    i2s.write(data, length);
 }
 
 void setup() {
@@ -42,7 +32,7 @@ void setup() {
   // setup output
   auto cfg = i2s.defaultConfig();
   cfg.pin_data = 23;
-  cfg.sample_rate = a2dp_sink.sample_rate()*2;
+  cfg.sample_rate = a2dp_sink.sample_rate();
   cfg.channels = 2;
   cfg.bits_per_sample = 16;
   i2s.begin(cfg);

examples/sandbox/basic-a2dp-i2s/AudioConfigLocal.h

@@ -0,0 +1,4 @@
+#pragma once
+
+#define I2S_BUFFER_COUNT 8
+#define I2S_BUFFER_SIZE 256

examples/sandbox/basic-a2dp-i2s/basic-a2dp-i2s.ino

@@ -0,0 +1,46 @@
+/**
+ * @file basic-a2dp-audioi2s.ino
+ * @brief A2DP Sink with output to respampled I2S
+ * 
+ * @author Phil Schatzmann
+ * @copyright GPLv3
+ */
+
+#define USE_A2DP
+#include "AudioConfigLocal.h"
+#include "AudioTools.h"
+#include "AudioExperiments/Resample.h"
+
+BluetoothA2DPSink a2dp_sink;
+I2SStream i2s;
+Resample<int16_t> out(i2s, 2, 2);
+
+// Write data to SPDIF in callback
+void read_data_stream(const uint8_t *data, uint32_t length) {
+    out.write(data, length);
+}
+
+void setup() {
+  Serial.begin(115200);
+  AudioLogger::instance().begin(Serial, AudioLogger::Warning);
+  
+  // register callback
+  a2dp_sink.set_stream_reader(read_data_stream, false);
+
+  // Start Bluetooth Audio Receiver
+  a2dp_sink.set_auto_reconnect(false);
+  a2dp_sink.start("a2dp-i2s");
+
+  // setup output
+  auto cfg = i2s.defaultConfig();
+  cfg.pin_data = 23;
+  cfg.sample_rate = a2dp_sink.sample_rate()*2;
+  cfg.channels = 2;
+  cfg.bits_per_sample = 16;
+  i2s.begin(cfg);
+
+}
+
+void loop() {
+  delay(100);
+}